As soon as I see that you are practicing like Pang Zhonghua, I suggest you directly copy the ancient small regular script calligraphy with a pen. I recommend you a few famous zhongshaojing "Ling Fei Jing", Wang Xizhi Le Yi Lun, Wang Xianzhi Luo Shen Fu and Zhao Mengfu. The Tao Te Ching and Wen Zhengming’s small regular script are also very beautiful. I personally like Ling Fei Jing and Wen Zhengming’s small regular script. Today we see that the ancient people’s small regular script is all in the original large size. The ancients only wrote in this large size. It is about the same size as today’s pen calligraphy, which is just right for us. Don’t be greedy for too much when writing. Find typical words and copy them first, and then you will draw parallels